Grenade



March 7, 1933- E. w. BRANDT GRENADE Filed July 18. 1931 6 Sheets-Sheet lgm/l.

E. w. BRANDT 1,900,790

GRENADE Filed July 18, 1931` 6 Sheets-Sheet 2 March 7, 1933.

6 Sheets-Sheet 3 @.9

n. MS\\\,\.

E. W. BRANDT GRENADE Fiied July 18, 1951 March 7, 1933.

7, 1933. .E w BRANDT I Y 1*,.90f790`I A GRENADE Filed July 18, 1931- 6Sheets-Sheet 4 Hy. l2 fi l 'L March 7, 1933. E W, BRANDT 1,900,790

GRENADE Filed July 1S, 1951 6 Sheets-Sheet 5 Mfg* E. w. BRANDT GRENADEFiled July is, 1951 v6 sheets-sheet 6 .ed 4 o 000000500 March 7, 1933.

l 40 'cording to this invention, in

Patented 7;, 1933 "i PATENT oFFlcr.-

' EDGAR BRANDT, (')F PARIS, FRANCE GRENADE applicati@ med July 1s,

The present invention has for'object improvements in grenades and, moreparticuy larly, relates to a projectile of this type which may be firedby aid of any mechanism such as a firearm `or a pneumatic gun, but isparticularly well suited for-firing rom a same weight and propulsiveforce, of anappreciably longer trajectory than thoseqattained with thisprojectiles of the 'same type which are now in use. g It\ is especiallyremarkable in that it is constructed and arranged in such vmanner 1,5as-to recover, for its propulsion, the kinetic energy of the rifle ballor in general of thegun employed for firing it. The invention likewiseshows an especially sensitivefuse mounted'on the said gres 20.nade, thefusecomprising particularly asafety`mechanis1n which is automaticallywithdrawn at the time of firing, under the effeet of the shock of thebullet, which permits providing a very strong latching or lockforobtaining an' absolute safety, s ince no shock of the same order ordegree can be produced v in the course of,transportation.and manipu- &lation. l.

Thelinvention concerns,

of the firearm'and whoseactive length may be regulated as desired forvarying the trajectory.

s It also has for object various methods of y construction of thegrenade which permit using it as a message carrying projectile, a

smoke bomb, incendiary bomb, and signal bomb. l

VFig'. 1 is an axial section of a grenade'acthe position for firing `onits sleeve, which is fastened on a rifle Lbarrel Fig. 2 is a transversesection on line 2--2 of Fig. 1.

Fig. 3 is an axial section on a larger scale of the forward portion of.the grenade, showing the fuse in the position of rest.

Figs. 4, 5 and 6, are views analogous to those of Fig. .3, showingrespectively the positions taken by the elements atthe mo- This grenadepermits attaining, with-the p further, a firing. 30 sleeve Awhich can bemounted on the ybarrel 19:31, serial no. 551,744. a1 1a in' France July25, 1939.

ment of firing, after the cessation of the positive acceleration, and atthe impact.

Fig. 7 is a transverse section oi' the braking tube deformedbythe bulletat the mo- Fig. 8 is an axial section of the ront'portion of the grenadeshowing another examle 'of the construction of the fuse.

Figs. 9, 10 and '11 are views 'analogous to those of Fig. 8 and showrespectively the positions taken by the elem'ents at the'moment offiring2 after-the cessation of the positive acceleration, and latimpact.

- Fig. 12 is an elevation of a different construction of the firingsleeve, the outline of the grenade being shown in dotted lines.

Fig. 13 is a fragmentary axial section of a detail of a modified form ofring sleeve.

Fig.. 14 is a transverse section on line 14-14 of Fig. 13.

Fig. 15 is an axial section oi a'modilied grenade comprisingtheimprovements which are the objects of this invention, mounted on itsring sleeve, represented in dotted Figs. 16 and 17 are analogousviewsshowingdiierent constructions of the braking tube.

Figs. 18 to 2 1 are axial-sections of grenades -according to theinvention, adapted respec-y tively to operate as message carrying, smokeYbomb, .incendiary and signalling projectiles'.

VAccording to the example of execution represented in Fig; 1, thegrenade comprises/ essentially a hollow body 1 enclosing the charge 2.This'body is provided with an eye in which may be fastened, bythethreads 4 or otherwise, a fuse 5.

It will'- be understood 'that the grenade charge may'be` of any` typeand constituted by an explosive, smoke producing, signallin or othertype of material. l rooves 6 orother cavities, formed in the Walls ofbody 1, facilitate fragmentation.

At the rear of the body 1 is rigidly seated' the propelling tube 7 Thefixing of tube 7 on. thebody -may take place by crimping or rollingatvll, as shown in Fig. 1, or by soldering, l\by'welding, by riveting,by aid of a threaded or other joint, or in any other manner. The tube 7is capable of sliding 10 removablev manner on thel riiie 9 by aid ofconnection 10.

Packing grooves 11', are provided on the I external surface of thefiring sleeve 8.

A braking tube .12 is seated atthe rear of the grenade and is placedinside the firing sleeve 8 -along the axisof the rifle 4barrel 9. Thefastening of the tube 12 to .the

A barrel `rear of the grenade is preferably accomplished in such mannerthat the 'said tube 12 is detached from the grenade at4 the moment offiring. For this purpose, inA the example of Fig. 1, the tube 12 isfastened r by aid of a pin 13 on a lug 14 of the grenade. This lug 14advantageously lcomprises a portion 15 which widens out from the reartoward the front in the mannershown. A plastic or yieldable element,preferablyY formed by'a lead washer 16, is interposed between the lugand the tube 12.

The internal surface of the tube 12 has, for all or a part of itslength, a lesser diameter than the calibre of the rifle bullet. Thisdiameter diminishes regularly or irregularly from the rear toward thefront. Its profile may be cylindrical, stepped as shown, conical,cylindro-conical, threaded or otherwise.

By way of modification, there may be located in this tube a very hardauxiliary ball,

j .of steel, for example, intended to be driven forward by the riflebullet.

A tail.20, preferably connectedI on. the tube 7, assures the stabilityof the projectile during Hight. Thistail may also be formed of anappropriate n shaping, undulated, iared, or 'otherwiseat the rearportion of the tube 7. f

The front sight 21 ofthe rifle cooperates with a suitable slot 22 inthefiring sleeve 8, (Figs. 1 and 12) to form a bayonet joint, assuring the,fixation ofthe firing sleeve`8 on the barrel 9. A ring 23 forceddownward by a spring 24 and retained by-a spurV 28, is engaged in alongitudinal slot 26 of the ring sleeve 8, and assures the latching ofthe latter onto Ythe barrel 9, as by turning the sleeve 8 ine-a suitabledirection and pressing the ring- 23. againstthe top of the front sight21, the latter is locked'in a corresponding notch 27 of the ringV 23.Any other type of joint mayv also be well employed for fastening. thefiring tube 8 on t e I'lfle. l f The fuse represented in Fig. 3comprises a nosev 30 seated at 31 by screw threadsor otherwise inthe eye34 of the grenade 1. In the example illustrated, this fuse holds .the'detonator holder 32 in a recess 33' provided atthe hase of the screwthreads 31. The detonatorr34 is held in place -in its cup 35, by aianged member 36 pierced with an opening 37 coveredby Va gasket 38. Aconstriction 39 or other type of fasteningserves von the 'firing sleeve8-which mountediin pto rigidly connect the flanged member 36 and the cup35 which rest against a shoulder of the nose 30.

The assembly is covered b on which is centered a tube in which mayslide, with slight friction,F1 a primer holder 45. flhe rimerv 46 isheld in the primer holder 45 y any suitable fastenino' device, formed inthe illustrated example by la collar 47.

A safety device comprising preferably balls 48 held in latched positioninvtheir seats 49 by aid of a. ring 50, normally blocks the primerholder 45 at a suitable distance from the firing pin 53 to avoid anyrisk of a washer 434 4 percussion incase of a fall or of accidental andconsequently the balls 48 in the latched position. f

, The firing pin 43 is mounted in such ner as to be able toslide in aperforated cup 55 resting on the tube 44. A spring 56 or other elasticelement, interposed between 'the cup 55 and the firing pin 532 tends tomain ilin the latter in the posltion shown in An appropriate stop, su'chas a crimp 57, opposes the departureof the firing' pin from ,its seatand blocks the cup 55fin position.

With a view of increasing, further the f" f mansafetyagainst prematurepercussion in the' course of manipulation prior totiring, the

firing pin 53 and the gasket 58 of the primer 46 are constructed andarranged in such mannerV as to form` a soft pointhard plate system, asdescribed in French Patent 622,701 dated February 9, 1926. The operationis as follows:

At the moment of firing, the ball 60 be'- comes seated in the brakingtu'be 12 (Fig.I 7) in such manner that its kinetic energy adds itseffect to that ofthe cartridge ases for ring the grenade 1, whose propeling tube 7 ,(Fig. 1) is guided by' the tiring sleeve 8, the tightness ofthe joint being assured by the grooves 11. At thesame time, -under thepressure exerted by the ball 60, the tube 12 compresses the plastic,washer 16, shears the pin VV13, is expanded onthe conical portion 15,and is easily detachedfrom the lug 14, the pressure of the gaseson therear of thei grenade@ bein much greater than that on the tube 12.Cnsequently, the tube 12 falls to the ground at. the mouth of the firingsleeve 18. f1

0n the other hand, whenlthe grenade isf driven forward under the effectof the shock i of the ball, the ring 50 (Fig. 4) remains bef j hindbecause of inertia and overcomes the action of its detent 54 (Fig. 3)and thus liberates the balls 48 which separatey and unlatchthe primerholder 45. j

The firing pin 53 also remains behind,

likewise because of inertia, by compressing `its spring 56 and coinesintoothe position of Fig. 4.

When the positive acceleration has ceased, the spring 56 returns thefiring pin 53 into its initial position, (Fig. andthe primer.

holder 45, no longer being retained, is'displaced forwardly-byitsinertia, by reason of the relative braking imparted to the grenade bythe resistance of the air.` It finally comes into the position 'of Fig.5, where it ahuts against the cup 55. During the time taken by theprimer holder forlpas'sing from the positionoi Fig. 3 to that of Fig.v5,

' in which percussion is possible, the `enade has traversed a certaintrajectory.- uring this rst portion of the trajectory, all risk ofpremature percussion'resultng from the encounter of the projectile withan' nnex i pected 4`obstacle near the grenadier is abso-` lutelyeliminated since the spacing .0f the' primer 46 from the firing pin 53renders per-l cussion impossible. This distance or this time of safetyafter firing may also be regulated at vwill by varying the travel ofthey primer holder 45 and its coeiicient of friction in the tube 44. Anelastic element of variable force may also beinterposed between theprimer holder 45 and the washer It may be remarked that the dimeruisionsof the elements are chosen. in such manner that there exists between thepoints of the 'firing pin 53 and the primer 46, in the posiltion of Fig.5, a suilicient'distance for permitting the' almost total immobilizationof the lfiring pin before percussion, which is thus efected at impact,with a maximum velocityA of shock (Fig.A 6). Conse uently,'

" the operation is instantaneous'an'd t e fuse,

being extraordinarily sensitive, operates? even at contactA with anobstacleA of ex- '.'tremely low density: thin soil, mud, sand,

the surface of water, etc.

In the modification of Fi s. Sato 11, the

`prim`er 46 is held fixed in t e tube 44 land' rthe balls 48 are"constructed/in such a mannerv as to oppose, in normal times, thedriving of the firing pin 53, which in the present example, comprises acavity 63 with a view 'of reducing its mass to a mininium and thusfurther 1'nerease the'sensltiveness of the fuse.

The 'axes of the seats`64 of the balls 48 preferably forman acuteanglewith the foryward direction of theaxisof the fuse,.`"as

illustrated. Y K v\ At the moment of firing, the elements assume theposition of Fig. :9the firing pinl j 53'coming byL inertia, to bear'onthe balls 48 which it leaves under, "the action -of its spring, when thepositive acceleration has Y ceased (Fig. l0). vUnder the eifecto airresistance which is exerted on -tlie exterior of the projectile, theballs -48 arefa'dvanced by mertia 1n thelr seats 64 and unlatch the -berof perforations 71 capable of being obfiring' pin 53 which maythen, atimpact', tire the primer 46 (Fig. 11).

It will be seen that the grenade and the Erin sleeveaccording .to thisinvention, avoi ing leakages of gas from the' car: tridges, permitutilizing their action to a maximum. Thusresults a notable increase inthe trajectory for a given charge.

The 'particular arrangement of the firing sleeve 8 `(Fig. l) permitsgiving it a reduced cross section, which reduces to a minimum the,reaction of the gases on the rifle butt. This offers thedouble`advantage of facilitating the firing and of avoidingdeterioration of the rearm. v

Furthermore, owing to the squatty shape ofthe ring sleeve 8, its weightis reduc'ed to a minimum and the front sight 21 of the riie' projectsover it, which permits of the ordinary lire' 'with balll cartridges eventhough the firing? sleeve is mounted on the firearm, and it thus furtherconstitutes an excellent concealing device for the flash. f m

-ing is no longer accomplished with a stray t e ball, as in certainsimilar devices at present time, any risks of .accident outside ofthe'zone of fire` being thus eliminated.

sleeve 8, in which a .ring'66,'m0unted on the ring sleeve 8, serves forvarying the trajectory byfmodifying the eifective length of the sleeve.Thisring comprises at its interior a Fig. 12 shows a modification loffthe firing screw thread'bengaged with a threadl on the' l iringsleeve, whose cavities 68 play. the

part of packing grooves. A spring stop,`

pawl 69, fixed on the ring 66 and ca able of being engaged in notches 70of the ring tories, permits regulating the position of the propellingtube 7 conveniently. This element may be formed. by any otherappropriate stop device.

Figs. 13 and-14 show a different construction in which there isprovided, at the `sleeve corresponding tothe different trajecbase of theringlsleeve 8, a certain numstructed by aid of a vturning ring 72,itself pierced by orifices 73, which serves to regulate the crosssection for exhaust or escape ofered to the cartridge gases andconsequently the trajectory of the projectile.

,The brakingrtube 101 is.lodged on-the, body of the grenade 102 by.screw threading .or otherwise and may have internally na steppedcylindrial profile,y as represented,`

or may be entirely cylindricall or conicall '130 for all or a part ofits lllgth,and finally,

as f' in ageneralmanner, it may have any appropriate form for the brakmgof the bullet.l It encloses a\material which is rather in- `compressiblebut is easily displaceable or J deformable, such as a liquid 103 oramixture of more .or less viscous liquids or, again, a solid material infinely divided state. Thus rubber, felt, cork, or a material solid" atthe v 10:ordinary temperature and capable of melting undergthee'ect ofthe heat disengaged by the bullet, such as wax, resin, etc., or in-ydeed`combinations of various analogous materlals formlng dampingdevices, may also be utilized. Y

The braking material, when it is not solid, y

` under the effect of variations of temperature.

l posed.

There will be chosen, preferably, a4 liquid whose freezing point islower than the lowest" temperature to which the tubes may beex- At themoment ofhliring, the rie bullet. or other projecting device perforatesor drives the closing plate 104 and is braked in an extremelyenergetic-manner by the liquid 103 .contained in the tu'bes 101,which-can only escape gradually betweenthe bullet and the tube, partlyin the state of vapor. The

transformation into heat 'oa part of the` kinetic energy 0f the bulletgenerally produces, in effect, a partial vaporizatlon of the brakingliquid. In thismanner a gradual braking of the bullet and a greatflexibility of propulsion of the grenade isattained. Further, the liquidpressed or forced by the bullet transmitspressurel in a very uniformmanner to the walls of the tube, which consequently are deformed in avery regular manner.v j

In case that firing takes place by aid of jacketed bullets, i. e., thosecomprising, for example, a lead .core surrounded by. a brass jacket,braking tubes of the type represented in Figs. 16 and17 .mayadvantageously' be em loyed according to this invention.

ccording to the example of execution of Fig. 16, there is disposed atthe interior of the tube 101, a certain number of stop disks 105 formed,preferably, ofa resistant material rsuch as steel. These disks whichbeen, for example, force-fitted inthe tube 101 are pushed and -orcedsuccessively by the bullet. One or more rings 106 are fur-l therdisposed in the tube in such manner as to leave betweel theirperipheries andV thel Walls of the tube 101, a free space intended tocollect the molten lead which thus does no t fall into the firin sleeve.y j The results soug t may also be attained by disposing in the tubeonev or more flanged have tion'with the dis is 105. 'l These various.ele-

ments further constitute cups for holding the molten lead. It may beremarked further 'that the heat. necessary for the vaporivzation y01Ethe liquid is limited to the variable fraction of kinetic energy of the.bullet and further decreases the" quantity of heat re-V maining freevfor the-fusion of the metal.

- The greaterV part of the kinetic energy of the bullet is naturallyemployedv forthe propulsion of the grenade for the deformation of thebullet and'tube and/for the' displace- 4ment ofthe liquid.'

Fig` 18 shows an example of the application of the grenade accordingtothe invention as a message carrier. For this purpose, the renade body102 is perforated at the rear'y a channel 110 opening into the firingsleeve -111 and by a second channel 112 communicating with the exterior.These channels are normally closed by aid of appropriate means such ,asthe wax plugs 113 and114. A

At the interior vof thegrenade 102 .isidisposed a receptacle 115enclosing a 'smoke charge 116, \\capable of ,being lighted by.

meanswor` a delay-fuse composition 117, re-

lated to the-channels 110 and 112.I Above 4the receptacle 411.5 is.disposed the message carrying pocket 118 which rests, preferably, in aprotecting cup 119. A suitable device such as'a gasket 120 serves toconnect the two elements together, with the exclusion ofA the pocket 118which is -simply retained in place by the cover"l 121, passing by screwthreading or otherwise on -the grenade '102.'

The operation is as follows: at the'monent of firing the propellinggases melt the 'plugs 113 and 114 and ignite'the .delay fuse 117e:which, in its-turn, sets ire to thed charge 116 at the end ofarpredetermined time. lThe channel 112 opposes any injuriousoverpressure on the delay lfuse 117. rlhe smoke producing compositionburns and the smoke escapes through the channels and 112,

following the projectile and indicates its point of fall. It issufficient to uncover the screw 121 to `withdraw the' message carryingpocket 118.

- While the propelling tube 122 formsa chim- 4n ey. i The smoke which is-evolved permits Fig 19 shows a-m-odfication of construction of thegrenade, applied to the firing of a smoke producing charge yenclosedin.a cartridge-(125' which may be introduced into the 'remade 102 afterremoving the cover 121. delay fuse 126, of lengthnwhlch 'may beadij'usted at will, permits effecting the ignition ofthe smoke producingcomposition 127 at the desired moment.

. In the example'fof Fig. 20, theigrenade is more particularly adaptedto utilization as :ln-incendiary'projeetile. -The`lateral portion of thebody of the grenade is 'simply formed by`an' extension'128 of the firingmonaco sleeve 122, inside which is disposed-a cartridge 129 enclosingthe incendiary material 130, ignitedby aid of a suitable composition131, which itself isignited by the delay fuse '5 126. A cover 132, ofproper aerodynamic form, closes the front of the grenade.

Fig. 21 shows an analogous example of construction, being applied to anillumination oi' signalling projectile. The illuminating charge 135 isenclosed in a suitable receptacle 136 connected to a parachute 137.

A match 138 permits the ignition of the charge 135 by the startingcharge 139 resting in the delayfuse holder 140. A cover\ 141, fastenedby soldering or otherwise,

' 'closes the front of the grenade. One or -more washers 142, ofasbestos for example, are preferably inserted between the charge 139 andthe receptacle .136 to avoid any pref mature'deterioration of thelatter.

At the momentof iring the delay`\fuseA 117 is ignited by the propellinggases and causes, at the end of a predetermined time, the ignition ofthe starting charge 139 which -expels`the receptacle 136 and theparachute 1371 by blowing of the cover 141. vThe" charge 135 is ignitedby the charge 139 and suspended from the parachute 137 and 'produces thedesired illumination or signal.

3Q The Idisposition adopted for the message carrying grenades, thelsmoke producing and possibly for the incendiary grenade, permits givingthem the same weight and the same external proile as ordinary grenadesand l-conse`quently of {irin' themwith the same `precision and tables.

Naturally the invention is not limited to the forms of constructionrepresented and 40 described which have only been chosen by way ofexample:

I claimzi 1. 'A grenade of the class described com-` prising a grenadebody, means for releasutilizing the same tiring '45 ably attaching thesame to the projective weapon, and an element located, in the path ofthe projectile from said weapon whereby to absorb for the propulsion ofvthe grenade the kinetic energy of the projectile, said elementcomprising a brakingtube, .and a ma- 'J terial lin said tube which issubstantially( inlcompressible,but easily displaceable or d e-A formableupon the impact -of theprojectile '-thereon. I

v v2. A grenade of the class described, 'com' prising a grenadebodymeans. forreleasably attaching the same to the project1 ve V.weapomand an velernentlocated in the path of theprojectile yfromSaidLWeapOn whereby .'60 to absorb for the propulsion of the grenade.

vthekineticenergy of the projectile, said element comprising a brakingtube, a liquid material" in -said tube, and'means for pre'- .ventingescape of said liquid, sald means being located qpposite the b ore ofthe pro-` prising a i jective weapon for perforation by the projectileupon' discharge. y

3.' A grenade of the class described comprising a grenade body, meansfor releasably attaching the same tothe 4projective 7- weapon, and anelement located inthe path ofthe projectile from`said Weapon whereby tolabsorb for thepropulsion of the 'grenade the kinetic energy of the'projectile, said f elemnl'mcomprslng, a braking 'tub d braking elementslocated inside the tube to be successively encountered andmovedl forwardby the projectile whereby to assure a` progressive transmission of thekinetic 'energy of the projectilel to the grenade.

5. A grenade of the class described comt prising a grenade body, meansfor releasably attaching the same to the `projective weapon, andanelementlocated in the path of the projectile from said weapon 'wherebyto absorb for the propulsion of the grenade` the kinetic energy of theprojectile, said element comprising ya braking tube and ay pluthe tubeto be successively encountered by ma rality of braking elements locatedinside the projectile upony discharge, whereby to r 2 assure aprogressive transmission of the i kinetic energy of the projectile tothe gie- 1.05

fnade, atleast one of said elements inclu a portion lfor collectingandretainingl fiised material from the projectile.' f ,f J

6.-,A grenadeof the class described,comj renade body, meansforreleasably attac ving the'same tothe projective weapon, andan elementlocated in the path of the projectile'from-said weapon whereby to absorbfor the' propulsion of the grenade' the kinetic energy of theprojectile, said element comprisingjaJ braking rtube securedI to thebase of the. grenadev and released ltherefrom by the impact of theprojectile. i `7. A grenade, of the class described, com- 'f prising agrenadefbody, means for releas# ably attachingthe same to the:projective jwjeaponyand,an elementlocated inthe path of the projectile.f'o'mffsaid .weapon/whereby to absorb for thefpropulsion; offthe;grenade the kinetic ,energynof vthe-projectile, said element comprisingva'braking tube and a plug of1hardmaterialf located .in said/tube to be`encounteredby the projectile upon dischargejand tobe ,driveny along thelength of said tube. ,y f- A 130 `diameter of the irin rear of saidgrenade ody to extend into the v e 50 the A8. A grenade. ofthevclassdescribedcom `prising a grenade body, mea s for releasably attaching thesame to t e projective weapon, an element-locatedin the path of 5 theprojectile from saidy weapon whereby to 'absorb for the propulsion ofthe grenade the kinetic energy of the projectile, said elementcomprising a braking tube mounted at the rear of the grenade bodyandhaving 10 for at least a part of its length a diameter.

Vless than the calibre of the projectile -rom the Vprojective weapon anddecreasing in cross-section from the rear 'toward the front, and apropelling tube vsurrounding said 1'5-braking tube for, cooperation witha :tiring sleeve attached to the? barrel of the propulsive weapon, said4firing sleeve having an f internal diameter greater than the externaldiameter of the braking ltube and leaving 20 free space vfor the brakingtube to swell under the actionl of'the projectile'therein.

9. A grenade of the class described comprising a grenade body', meansfor releasably rattaching the same to the projective weapon, an elementlocated in the path of 4the projectile from said weapon whereby toabsorb for '.the propulsion of the grenade the kinetic energy of theprojectile, said element comprising a braking. tube mounted I at therear of the grenade body and having for at least a part of its length adiameter less than the 'calibre of the projectile from the Iprojectiveweapon and decreaslng 1n cross-section from the rear toward the front,'and a propelling tube surrounding said brak Vingy tube for cooperationwith a tiring lsleeve* attached to. the4 barrel of the proplsive wea on,said pro elling tube bein secured to t e base of t e grenade and aving a.40 stabilizing tail at its rearward end.

10. A grenade ofthe class described for discharge from a firearm' havina firing sleeve attached thereto ofintern'a l.diameter .greater than thebore of the firearm, coniprising a grenade bod of extern diameteressthan the internal sleevesecured to the ring sleeve, a' ropulsion tubesecured to smooth lnterior'surface to fit over the rlng frsleeve forholding the braking tube in aline ment with the bore of said firearm,said ring sleeve having thereon a trajectory-determining memberadjustablel axially on the sleeve and serving as a stop in cooperationwith said propulsion tube to determine the distance o 11. A grenade ofthe classdescribed comlprising a gre ade body, means for releasthel sameto the projective ably attachi weapon an element located'in the path ofp the projectile from -said weapon .whereby to A'section from t e reartoward the front and. a braking tube insertion of said braking tube 60into the firing sleeve.

owder gases from 12. A grenade ofthe class described`,`coml prising agrenadebody, a braking tube located wholly outside said body and secured-to the base of the grenade -and adapted to absorb the kinetic energy ofthe projectile for the propulsion of the grenade and to be released fromthe grenade upon the impact of the projectile, said braking tube havingfor at least a part of its length an internal diameter less than thecaliber of the projectilefrom" the-projective' weapon and decreasing ininternal cross-section from the rear toward the front, and means .forreleasably supporting said body and tube upon the projective weapon withsaid tube in alignment with the bore'of said weapon and spacedtherefrom. j

13.4 A grenade of the class described, comprising la grenadeL body, abraking tube located wholly outside said body and secured to the base ofthevgrenad'e and. adapted to absorb the kinetic energy of the projectilefor theA propulsion of thegrenade and t0 .be released from the grenadeupon th'e impact of the projectile, said braking tube having forat leastapart of its length an internal diameter less than the caliber of theprojectile from the projective weapon stepwise in internal'/ crossandmeans for releasably supporting .said body and tube upon the projectiveweapon with said tube in alignment with the bore of said weapon andspaced therefrom.

In testimony whereof, .I affix my signature.

y FEDGAR WILLIAM "BRANDT,

and decreasin genade bo y and concentrically surroun ingv said brakingtube andy having a'

